Electricity feeding structure

ABSTRACT

The present invention relates to an electricity feeding structure, comprising: a resonator including an electricity feeding part and a ground part connected to the electricity feeding part; a resonance adding part disposed between the electricity feeding part and the ground part; and a controlling part disposed in at least one of the electricity feeding part, the resonance adding part and the ground part. According to the present invention, since the electricity feeding structure includes the controlling part, it is possible to easily control the resonant frequency band of an antenna device.

TECHNICAL FIELD

The present invention relates to a configuration of a communicationterminal, and more particularly to a feeding structure of an antennaapparatus.

BACKGROUND ART

In general, a communication terminal includes an antenna apparatus totransceive an electromagnetic wave. The antenna apparatus makes aresonance in a specific frequency band to transceive the electromagneticwave having the frequency band. In this case, when the antenna apparatusmakes a resonance in the frequency band, impedance has an imaginarynumber. Further, an S parameter of the antenna apparatus is rapidlyreduced in the frequency band.

To this end, the antenna apparatus includes a conducting wire having anelectrical length of λ/2 in relation to a wavelength λ corresponding toa desired resonance frequency band. The antenna apparatus transmits theelectromagnetic wave through the conducting wire and the electromagneticwave forms a standing wave in the conducting wire so that resonance ismade in the antenna apparatus. In this case, the antenna apparatus mayinclude a plurality of different conductive wires s to expand aresonance frequency band.

However, since the length of the conductive wire is determined dependingon a resonance frequency band in the antenna apparatus, the size of theantenna apparatus is determined depending on the frequency band.Accordingly, as the resonance frequency band to be realized in theantenna apparatus is narrowed, the antenna apparatus may be enlarged.The enlargement of the antenna apparatus is more made as the number ofconductive wires is increased. In other words, as the resonancefrequency band is expanded in the antenna apparatus, the antennaapparatus may be enlarged.

DISCLOSURE Technical Problem

Accordingly, an object of the present invention is to easily regulate aresonance frequency band in an antenna apparatus. In other words,according to the present invention, the resonance frequency band of theantenna apparatus can be regulated without the increase of the size ofthe antenna apparatus to a large size.

Technical Solution

In order to accomplish the object of the present invention, there isprovided a feeding structure including a resonance unit including afeeding unit and a grounding unit connected with the feeding unit, aresonance adding unit between the feeding unit and the grounding unit,and a regulator in the feeding unit.

In the feeding structure according to the present invention, theregulator changes a resonance loop formed by the resonance unit.

Meanwhile, in order to accomplish the object of the present invention,there is provided a feeding structure including a resonance unitincluding a feeding unit and a grounding unit connected with the feedingunit, a resonance adding unit between the feeding unit and the groundingunit, and a regulator in the grounding unit.

In this case, in the feeding structure according to the presentinvention, the regulator includes a resonance loop formed by thegrounding unit and the resonance adding unit.

Meanwhile, in order to accomplish the object of the present invention,there is provided a feeding structure including a resonance unitincluding a feeding unit and a grounding unit connected with the feedingunit, and a resonance adding unit interposed between the feeding unitand the grounding unit, and a regulator provided in the grounding unit.

In this case, in the feeding structure according to the presentinvention, the regulator includes a first resonance loop formed by theresonance unit and a second resonance loop formed by the grounding unitand the resonance adding unit.

In this case, in the feeding structure according to the presentinvention, the grounding unit may include first and second groundingunits provided in opposition to each other about the feeding unit.

Further, in the feeding structure according to the present invention,the regulator may be provided in at least one of the first groundingunit and the second grounding unit.

Advantageous Effects

As described above, according to the present invention, the resonancefrequency band of the antenna apparatus can be easily regulated. Inother words, as the feeding structure includes the regulator, theresonance frequency band of the antenna apparatus can be easilyregulated. In this case, in the feeding structure, at least one ofresonance bands can be regulated based on the positions and thereactance of the feeding structure. Accordingly, the resonance frequencyband can be regulated without the increase of the antenna apparatus tothe large size.

DESCRIPTION OF DRAWINGS

FIG. 1 is an exploded perspective view showing an antenna apparatusaccording to the first embodiment of the present invention.

FIGS. 2 and 3 are circuit diagrams showing equivalent circuits of afeeding structure shown in FIG. 1 for an illustrative purpose.

FIG. 4 is a graph to explain an operating characteristic of the antennaapparatus according to the first embodiment of the present invention.

FIG. 5 is an exploded perspective view showing an antenna apparatusaccording to the second embodiment of the present invention.

FIG. 6 shows equivalent circuits of a feeding structure shown in FIG. 5for an illustrative purpose.

FIG. 7 is a graph to explain an operating characteristic of the antennaapparatus according to the second embodiment of the present invention.

FIG. 8 is an exploded perspective view showing an antenna apparatusaccording to the third embodiment of the present invention.

FIGS. 9 and 10 are circuit diagrams showing equivalent circuits of afeeding structure shown in FIG. 8 for an illustrative purpose.

FIG. 11 is an exploded perspective view showing an antenna apparatusaccording to the fourth embodiment of the present invention.

FIGS. 12 to 17 are circuit diagrams showing equivalent circuits of afeeding structure shown in FIG. 11 for an illustrative purpose.

FIG. 18 is an exploded perspective view showing an antenna apparatusaccording to the fifth embodiment of the present invention.

FIGS. 19 to 25 are circuit diagrams showing equivalent circuits of afeeding structure shown in FIG. 18 for an illustrative purpose.

FIG. 26 is a graph to explain an operating characteristic of the antennaapparatus according to the fifth embodiment of the present invention.

BEST MODE Mode for Invention

Hereinafter, the embodiments of the present invention will be describedin more detail. In accompanying drawings, the same elements will beassigned with the same numeric numbers. In addition, the details of thegenerally-known technology that makes the subject matter of the presentinvention unclear will be omitted in the following description.

FIG. 1 is an exploded perspective view showing an antenna apparatusaccording to the first embodiment of the present invention. FIGS. 2 and3 are circuit diagrams showing equivalent circuits of a feedingstructure shown in FIG. 1 for an illustrative purpose. FIG. 4 is a graphto explain an operating characteristic of the antenna apparatusaccording to the first embodiment of the present invention.

Referring to FIG. 1, an antenna apparatus 100 according to the presentembodiment includes a driving substrate 110, a grounding structure 120,an antenna device 130, and a mounting member 170.

The driving substrate 110 is provided for power feeding and support inthe antenna apparatus 100. In this case, the driving substrate 110 maybe a printed circuit board (PCB). The driving substrate 110 has a flatpanel structure. In this case, the driving substrate 110 may be realizedin the form of a single substrate, or may be realized by laminating aplurality of substrates.

In addition, the driving substrate 110 is embedded therein with atransmission line (not shown). The transmission line is connected with acontrol module (not shown) at one end portion thereof. In addition, anopposite end portion of the transmission line is exposed. In otherwords, the transmission line receives a signal from the control moduleand transmits the signal from the one end portion to the opposite endportion. In this case, the driving substrate 110 may be divided into agrounding area 111 and an antenna area 113. In this case, thetransmission line may be exposed in the antenna area 113.

In addition, the driving substrate 110 includes a dielectric. In thiscase, the conductivity (σ) of the driving substrate 110 may be 0.02.Further, the permittivity (ε) of the driving substrate 110 may be 4.4.In addition, the loss tangent of the driving substrate 110 may be 0.02.In this case, the transmission line includes a conductive material. Inthis case, the transmission line may include at least one of silver(Ag), palladium (Pd), platinum (Pt), copper (Cu), gold (Au), and nickel(Ni).

The grounding structure 120 is provided to ground the antenna apparatus100. The grounding structure 120 is formed in a portion or an entireportion of the driving substrate 110. The grounding structure 120 may beprovided on at least one of a bottom surface or a top surface of thedriving substrate 110. In addition, when the driving substrate 110includes a plurality of substrates, the grounding structure 120 may beinterposed between the substrates. In this case, the grounding structure120 may be provided at the grounding area 111 of the driving substrate110.

The antenna device 130 is provided in the antenna apparatus 100 totransceive a signal. In this case, the antenna device 130 operates at aresonance frequency band to transceive the signal. In this case, theantenna device 130 operates as a signal is supplied to the antennadevice 130 from the driving substrate 110. In addition, the antennadevice 130 makes a resonance at preset impedance.

In this case, the resonance frequency band of the antenna apparatus 100includes a plurality of resonance bands. In other words, the resonancefrequency band includes a first resonance frequency band f1 and a secondresonance frequency band f2. In this case, the first resonance frequencyband f1 may be lower than the second resonance frequency band f2. Inaddition, the second resonance frequency band f2 may be higher than thefirst resonance frequency band f1. In addition, the resonance frequencybands may be spaced apart from each other in a frequency domain.Accordingly, the resonance frequency band of the antenna device 130 maycorrespond to a multiple frequency band. Further, the resonancefrequency bands may be coupled to each other in the frequency domain.Accordingly, the resonance frequency band of the antenna device 130 maycorrespond to a broad frequency band.

The antenna device 130 is provided in the driving substrate 110. In thiscase, the antenna device 130 may be provided on the driving substrate110. In addition, the antenna device 130 makes contact with thetransmission line. Further, the antenna device 130 makes contact withthe grounding structure 120. In this case, the antenna device 130includes a feeding structure 140 and a radiator 160.

The feeding structure 140 is provided to supply a signal in the antennadevice 130. In other words, the feeding structure 140 operates theradiator 160. In addition, the feeding structure 140 operates togetherwith the radiator 160. In this case, the feeding structure 140 suppliesthe signal to the radiator 160.

The feeding structure 140 is provided on the driving substrate 110. Inthis case, the feeding structure 140 may be attached to a top surface ofthe driving substrate 110. In addition, the feeding structure 140 makescontact with the transmission line. In this case, the feeding structuremay be provided at the antenna area 113 of the driving substrate 110. Inaddition, the feeding structure 140 may make contact with the groundingstructure 120. Accordingly, the signal is introduced into the groundingstructure 120 from the feeding structure 140. In this case the feedingstructure 140 includes a resonance unit 141, a resonance adding unit147, and a regulator 150.

The resonance unit 141 determines the first resonance frequency band f1of the resonance frequency band for the antenna device 130. Theresonance unit 141 includes a feeding unit 143 and a grounding unit 145.The resonance unit 141 is formed by coupling the feeding unit 143 to thegrounding unit 145. In this case, the resonance unit 141 may beexpressed as a conductive wire as shown in FIGS. 2 and 3. In addition,in the resonance unit 141, the feeding unit 143 and the grounding unit145 may form a loop.

The feeding unit 143 supplies a signal to the resonance unit 141. Inother words, the feeding unit 143 makes contact with the transmissionline of the driving substrate 110. In this case, one end portion of thefeeding unit 143 makes contact with the transmission unit. In this case,one end portion of the feeding unit 143 is defined as a feeding point(FP) 144. For example, the feeding point 144 may make contact with thetransmission line near the grounding structure 120. In other words, thefeeding point 144 does not make contact with the grounding structure120. Accordingly, the signal is supplied to the feeding unit 143 fromthe control module. In addition, the feeding unit 143 extends from thetransmission line. In this case, the feeding unit 143 extends to anopposite end portion thereof. Accordingly, the signal is supplied fromthe one end portion of the feeding unit 143 to the opposite end portionof the feeding unit 143. In addition, the feeding unit 143 includes aconductive material. In this case, the feeding unit 143 may include atleast one of Ag, Pd, Pt, Cu, Au, and Ni.

The grounding unit 145 grounds the resonance unit 141. In other words,the grounding unit 145 makes contact with the grounding structure 120.In this case, one end portion of the grounding unit 145 makes contactwith the grounding structure 120. In this case, one end portion of thegrounding unit 145 is defined as a grounding point. In addition, thegrounding unit 145 extends from the grounding structure 120. In thiscase, the grounding structure 145 extends to an opposite end portionthereof. In this case, the grounding unit 145 makes contact with thefeeding unit 143 through the opposite end portion thereof. Accordingly,the grounding unit 145 is grounded, and the signal is transmitted to thegrounding unit 145 from the feeding unit 143. Further, the groundingunit 145 includes a conductive material. In this case, the groundingunit 145 may include at least one of Ag, Pd, Pt, Cu, Au, and Ni.

The resonance adding unit 147 adds a resonance band to a resonancefrequency band of the antenna device 130. In other words, the resonanceadding unit 147 determines the second resonance frequency band f2 of theresonance frequency band. The resonance adding unit 147 is interposedbetween the feeding unit 143 and the grounding unit 145 provided in theresonance unit 141. In this case, the resonance adding unit 147 isconnected with the resonance unit 141. Further, the resonance addingunit 147 is connected with at least one of the feeding unit 143 and thegrounding unit 145. Accordingly, the signal is introduced into theresonance unit 147 from the resonance unit 141.

In addition, the resonance adding unit 147 is connected with thegrounding structure 120. In this case, one end portion of the resonanceadding unit 147 is connected with the grounding structure 120. Indetail, the resonance adding unit 147 may make contact with thegrounding structure 120 through the one end portion thereof. Inaddition, the resonance adding unit 147 extends from the groundingstructure 120. In this case, the resonance adding unit 147 extends fromthe grounding structure 120 to an opposite end portion thereof. In thiscase, the resonance adding unit 147 is connected with the resonance unit141 through the opposite end portion thereof. Accordingly, the resonanceadding unit 147 is grounded, and the signal is transmitted to the oneend portion of the resonance adding unit 147 from the opposite endportion of the resonance adding unit 147. In addition, the resonanceadding unit 147 includes a conductive material. In this case, theresonance adding unit 147 may include at least one of Ag, Pd, Pt, Cu,Au, and Ni.

In this case, the resonance adding unit 147 may be expressed as aconductive wire as shown in FIG. 2. In addition, the resonance addingunit 147 may include a reactance element 148 as shown in FIG. 3. Inother words, the reactance element 148 may be provided on the conductivewire. The reactance element 148 regulates the resonance frequency bandin the antenna device 130. In other words, the reactance element 148regulates the electrical characteristic of the antenna device 130. Inthis case, the reactance element 148 regulates the second resonancefrequency band of the resonance frequency band for the antenna device130. In this case, the reactance element 148 has a preset reactance. Inother words, the reactance element 148 regulates the electricalcharacteristic of the antenna device 130 based on the reactance. In thiscase, the reactance element 148 includes at least one of a capacitiveelement and an inductive element. For example, the capacitive elementmay be a capacitor. In addition, the inductive element may be aninductor.

The regulator 150 is provided to regulate the resonance frequency bandin the antenna device 130. In other words, the regulator 150 regulatesthe electrical characteristic of the antenna device 130. In this case,the regulator 150 regulates at least one of the first resonancefrequency band f1 and the second resonance frequency band f2 of theresonance frequency band of the antenna device 130. The regulator 150 isprovided at the feeding unit 143. In this case, the regulator 150 may beinterposed in the feeding unit 143. Accordingly, the signal isintroduced into the regulator 150 from the feeding unit 143.

In addition, the regulator 150 includes the reactance element. In otherwords, the reactance element is provided at the feeding unit 143. Inthis case, the reactance element may be interposed in the feeding unit143. In this case, the reactance element has a preset reactance. Inother words, the reactance element regulates the electricalcharacteristic of the antenna device 130 based on the reactance. In thiscase, the reactance element includes at least one of a capacitiveelement and an inductive element. For example, the capacitive elementmay be a capacitor. In addition, the inductive element may be aninductor.

In this case, the regulator 150 may include an inductor or a capacitoras shown in FIGS. 2( a) and 2(b) and FIGS. 3( a) and 3(b). Meanwhile,the regulator 150 may include both of the inductor and the capacitor asshown in FIGS. 2( c), 2(d), 2(e), and 2(f) and FIGS. 3( c), 3(d), 3(e),and 3(f). In this case, as shown in FIGS. 2( c) and 2(d), and FIGS. 3(c) and 3(d), the inductor and the capacitor may be connected with eachother in series. In addition, as shown in FIGS. 2( e) and 2(f) and FIGS.3( e) and 3(f), the inductor and the capacitor may be connected witheach other in parallel.

The radiator 160 is provided for the actual operation of the antennadevice 130. In this case, the radiator 160 operates at the resonancefrequency band. In other words, as the signal is supplied from thefeeding structure 140, the radiator 160 operates. In addition, theradiator 160 and the feeding structure 140 operate together. Theradiator 160 is coupled to the feeding structure 140. In this case, theradiator 150 is electrically connected with the resonance unit 141. Inaddition, the radiator 160 includes a contact part 161. In this case,the contact part 161 makes contact with the resonance unit 141. In thiscase, the contact part 161 may be formed in the type of a pin, or may beformed in the form of a C-clip. In addition, the radiator 160 includes aconductive material. In this case, the radiator 160 may include at leastone of Ag, Pd, Pt, Cu, Au, and Ni.

The mounting member 170 is provided to support the radiator 160 in theantenna apparatus 100. In other words, as the radiator 160 is mounted onthe mounting member 170, the mounting member 170 supports the radiator160. Although not shown, when the antenna apparatus 100 is mounted in acommunication terminal (not shown), the mounting member 170 may bemounted on an inner surface of an external case in the communicationterminal. In this case, the driving substrate 110 may be provided in theinternal space of the communication terminal defined by the externalcase.

The mounting member 170 is provided corresponding to the drivingsubstrate 110. In this case, the mounting member 170 is providedcorresponding to the antenna area 113 of the driving substrate 110. Inaddition, the mounting member 170 is spaced apart from the drivingsubstrate 110 or the feeding structure 140 by the contact part 161. Inaddition, the mounting member 170 includes a bottom surface 171, a topsurface 173 corresponding to the bottom surface 171, and a side surface175 to connect the bottom surface 171 with the top surface 173. In thiscase, the mounting member 170 may be mounted on the external case of thecommunication terminal through the top surface 173.

In this case, the radiator 160 may be mounted on the bottom surface 171of the mounting member 170. Although not shown, the radiator 160 may bemounted on the top surface 173 of the mounting member 170. In this case,the radiator 160 may be interposed between the external case of thecommunication terminal and the mounting member 170. In addition, theradiator 160 may extend to the bottom surface 171 of the mounting member170 to the side surface 175 of the mounting member 170. Meanwhile, theradiator 160 may extend to the bottom surface 171 through the mountingmember 170. The contact part 161 of the radiator 160 may be provided ina space formed between the resonance unit 141 of the driving substrate110 and the mounting member 170.

Accordingly, the feeding structure 140 and the radiator 160 operatetogether. In this case, if the signal from the driving substrate 110 issupplied, the feeding structure 140 transmits the signal. Then, thesignal is supplied to the radiator 160 from the feeding structure 140.In this case, as shown in FIGS. 2 and 3, two loops of a first resonanceloop L1 and a second resonance loop L2 are formed in the feedingstructure 140.

The first resonance loop L1 is formed by the resonance unit 141. Inother words, the first resonance loop L1 includes the feeding unit 143and the grounding unit 145. In this case, the regulator 150 changes thefirst resonance loop L1. In other words, the first resonance loop L1 ischanged based on the reactance of the regulator 150. The secondresonance loop L2 is formed by the grounding unit 145 and the resonanceadding unit 147. In other words, the second resonance loop L2 includesthe grounding unit 145 and the resonance adding unit 147. In this case,when the resonance adding unit 147 includes the reactance element 148,the reactance element 148 may change the second resonance loop L2. Inother words, the second resonance loop L2 may be changed based on thereactance of the reactance element 148.

In addition, the antenna apparatus 100 operates at a preset resonancefrequency band. For example, the antenna apparatus 100 may have the sameoperating characteristic as that shown in FIG. 4. In other words, theantenna apparatus 100 makes a resonance at the first resonance frequencyband f1 and the second resonance frequency band f2. In this case, thefirst resonance frequency band f1 is determined based on the firstresonance loop L1. In other words, the first resonance frequency band f1is determined based on the size of the first resonance loop L1. Inaddition, the second resonance frequency band f2 is determined based onthe second resonance loop L2. In other words, the second resonancefrequency band f2 is determined based on the size of the secondresonance loop L2. In addition, when the resonance adding unit 147includes the reactance element 148, the second resonance frequency bandf2 may be regulated based on the reactance of the reactance element 148.In addition, the first resonance frequency band f1 and the secondresonance frequency band f2 are regulated by the regulator 150. In otherwords, the first resonance frequency band f1 and the second resonancefrequency band f2 are regulated based on the reactance of the regulator150. In this case, the first and second resonance frequency bands f1 andf2 are regulated in the frequency domain.

FIG. 5 is an exploded perspective view showing an antenna apparatusaccording to the second embodiment of the present invention. FIG. 6shows equivalent circuits of a feeding structure shown in FIG. 5 for anillustrative purpose. FIG. 7 is a graph to explain an operatingcharacteristic of the antenna apparatus according to the secondembodiment of the present invention.

Referring to FIG. 5, an antenna apparatus 200 according to the presentembodiment includes a driving substrate 210, a grounding structure 220,an antenna device 230, and a mounting member 270. The antenna device 230includes a feeding structure 240 and a radiator 260. In addition, thefeeding structure 240 includes a resonance unit 241, a resonance addingunit 247, and a regulator 250. In this case, the resonance unit 241includes a feeding unit 243 and a grounding unit 245. In this case, asshown in FIG. 6, the resonance unit 241 may extend to a feeding point244 of the feeding unit 243, and may be expressed as a conductive wire.In addition, the resonance adding unit 247 may be expressed as shown inFIG. 6( a). In addition, the resonance adding unit 247 may include areactance element 248 as shown in FIGS. 6( b), 6(c), 6(d), 6(e), and6(f). In other words, the reactance element 248 may be provided on theconductive wire. Since each configuration of the present embodiment issimilar to that of the previous embodiment described above, the detailsthereof will be omitted.

However, in the antenna apparatus 200 according to the presentembodiment, the regulator 250 is provided in the resonance adding unit247. In this case, the regulator 250 may be interposed in the resonanceadding unit 247. Accordingly, the signal is introduced into theregulator 250 from the feeding unit 243.

In addition, the regulator 250 includes a reactance element. In otherwords, the reactance element is provided in the resonance adding unit247. In this case, the reactance element may be interposed in theresonance adding unit 247. The reactance element has preset reactance.In other words, the reactance element adjusts the electricalcharacteristic of the antenna device 230 based on the reactance of thereactance element. In this case, the reactance element includes at leastone of a capacitive element and an inductive element. For example, thecapacitive element may be a capacitor, and the inductive element may bean inductor.

In this case, as shown in FIG. 6( a), the regulator 250 may be providedin the conductive wire corresponding to the resonance adding unit 247.Meanwhile, when the resonance adding unit 247 includes the reactanceelement 248, the regulator 250 may be connected with the reactanceelement 248 as shown in FIGS. 6( b), 6(c), 6(d), 6(e), and 6(f). In thiscase, as shown in FIGS. 6( b), 6(c), and 6(d), the regulator 250 may beconnected with at least one of both end portions of the reactanceelement 248 in series. In addition, as shown in FIGS. 6( e) and 6(f),the regulator 250 may be connected with the reactance element 248 inparallel.

Accordingly, the feeding structure 240 and the radiator 260 operatetogether. In this case, if a signal is supplied to the feeding structure240 from the driving substrate 210, the signal is transmitted from thefeeding structure 240. In detail, the signal is supplied to the radiator260 from the feeding structure 240. In this case, as shown in FIG. 6,two resonance loops, that is, the first and second resonance loops L1and L2 are formed in the feeding structure 240.

The first resonance loop L1 is formed by the resonance unit 241. Inother words, the first resonance loop L1 includes the feeding unit 243and the grounding unit 245. The second resonance loop L2 is formed bythe grounding unit 245 and the resonance adding unit 247. In otherwords, the second resonance loop L2 includes the grounding unit 245 andthe resonance adding unit 247. In this case, if the resonance addingunit 247 includes the reactance element 248, the reactance element 248may change the second resonance loop L2. In other words, the secondresonance loop L2 may be changed based on the reactance of the reactanceelement 248. In addition, the regulator 250 changes the second resonanceloop L2. In other words, the second resonance loop L2 is changed basedon the reactance of the regulator 250.

In addition, the antenna apparatus 200 operates at a preset resonancefrequency band. For example, the antenna apparatus 200 may have the sameoperating characteristic as that shown in FIG. 7. In other words, theantenna apparatus 200 makes a resonance at the first and secondresonance frequency bands f1 and f2. In this case, the first resonancefrequency band f1 is determined based on the first resonance loop L1. Inother words, the first resonance frequency band f1 is determined basedon the size of the first resonance loop L1. In addition, the secondresonance frequency band f2 is determined based on the second resonanceloop L2. In other words, the second resonance frequency band f2 isdetermined based on the size of the second resonance loop L2. In thiscase, if the resonance adding unit 247 includes the reactance element248, the second resonance frequency band f2 may be regulated based onthe reactance of the reactance element 248. In addition, the secondresonance frequency band f2 is regulated by the regulator 250. In otherwords, the second resonance frequency band f2 is regulated based on thereactance of the regulator 250. In this case, the second resonancefrequency band f2 is regulated in a frequency domain.

FIG. 8 is an exploded perspective view showing an antenna apparatusaccording to the third embodiment of the present invention. FIGS. 9 and10 are circuit diagrams showing equivalent circuits of a feedingstructure shown in FIG. 8 for an illustrative purpose.

Referring to FIG. 8, an antenna apparatus 300 according to the presentembodiment includes a driving substrate 310, a grounding structure 320,an antenna device 330, and a mounting member 370. In addition, theantenna device 330 includes a feeding structure 340 and a radiator 360.In addition, the feeding structure 340 includes a resonance unit 341, aresonance adding unit 347, and a regulator 350. In this case, theresonance unit 341 includes a feeding unit 343 and a grounding unit 345.In this case, the resonance unit 341 may extend to a feeding point 344of the feeding unit 343 as shown in FIGS. 9 and 10, and may be expressedas a conductive wire. In addition, as shown in FIG. 9, the resonanceadding unit 347 may be expressed as a conductive wire. In addition, asshown in FIG. 10, the resonance adding unit 347 may include a reactanceelement 348. In other words, the reactance element 348 may be providedon the conductive wire. Since each configuration of the presentembodiment is similar to that of the previous embodiment describedabove, the details thereof will be omitted.

However, in the antenna apparatus 300 according to the presentembodiment, the regulator 350 is provided on the grounding unit 345. Inthis case, the regulator 350 may be interposed in the grounding unit345. Accordingly, a signal is introduced into the regulator 350 from thefeeding unit 343.

In addition, the regulator 350 includes a reactance element. In otherwords, the reactance element is provided in the grounding unit 345. Inthis case, the reactance element may be interposed in the grounding unit345. In this case, the reactance element has preset reactance. In otherwords, the reactance element regulates the electrical characteristic ofthe antenna device 330 based on the reactance. In this case, thereactance element includes at least one of a capacitive element and aninductive element. For example, the capacitive element may be acapacitor. In addition, the inductive element may be an inductor.

In this case, the regulator 350 may include an inductor or a capacitoras shown in FIGS. 9( a) and 9(b) and FIGS. 10( a) and 10(b). Meanwhile,the regulator 350 may include both of the inductor and the capacitor asshown in FIGS. 9( c), 9(d), 9(e), and 9(f) and FIGS. 10( c), 10(d),10(e), and 10(f). In this case, as shown in FIGS. 9( c) and 9(d), andFIGS. 10( c) and 10(d), the inductor and the capacitor may be connectedwith each other in series. In addition, as shown in FIGS. 9( e) and 9(f)and FIGS. 10( e) and 10(f), the inductor and the capacitor may beconnected with each other in parallel.

Accordingly, the feeding structure 340 and the radiator 360 operatetogether. In this case, if a signal is supplied to the feeding structure340 from the driving substrate 310, the signal is transmitted from thefeeding structure 340. In detail, the signal is supplied to the radiator360 from the feeding structure 340. In this case, as shown in FIGS. 9and 10, two resonance loops, that is, the first and second resonanceloops L1 and L2 are formed in the feeding structure 340.

The first resonance loop L1 is formed by the resonance unit 341. Inother words, the first resonance loop L1 includes the feeding unit 343and the grounding unit 345. The second resonance loop L2 is formed bythe grounding unit 345 and the resonance adding unit 347. In otherwords, the second resonance loop L2 includes the grounding unit 345 andthe resonance adding unit 347. In this case, if the resonance addingunit 347 includes the reactance element 348, the reactance element 348may change the second resonance loop L2. In other words, the secondresonance loop L2 may be changed based on the reactance of the reactanceelement 348. In addition, the regulator 350 changes the first resonanceloop L1 and the second resonance loop L2. In other words, the firstresonance loop L1 and the second resonance loop L2 are changed based onthe reactance of the regulator 350.

In addition, the antenna apparatus 300 operates at a preset resonancefrequency band. For example, the antenna apparatus 300 may have the sameoperating characteristic as that shown in FIG. 4, similarly to theprevious embodiment described above. In other words, the antennaapparatus 300 makes a resonance at the first and second resonancefrequency bands f1 and f2. In this case, the first resonance frequencyband f1 is determined based on the first resonance loop L1. In otherwords, the first resonance frequency band f1 is determined based on thesize of the first resonance loop L1. In addition, the second resonancefrequency band f2 is determined based on the second resonance loop L2.In other words, the second resonance frequency band f2 is determinedbased on the size of the second resonance loop L2. In this case, if theresonance adding unit 347 includes the reactance element 348, the secondresonance frequency band f2 may be regulated based on the reactance ofthe reactance element 348. In addition, the first and second resonancefrequency bands f1 and f2 are regulated by the regulator 350. In otherwords, the first and second resonance frequency bands f1 and f2 areregulated based on the reactance of the regulator 350. In this case, thefirst and second resonance frequency bands f1 and f2 are regulated in afrequency domain.

FIG. 11 is an exploded perspective view showing an antenna apparatusaccording to the fourth embodiment of the present invention. FIGS. 12 to17 are circuit diagrams showing equivalent circuits of a feedingstructure shown in FIG. 11 for an illustrative purpose.

Referring to FIG. 11, an antenna apparatus 400 according to the presentembodiment includes a driving substrate 410, a grounding structure 420,an antenna device 430, and a mounting member 470. The antenna device 430includes a feeding structure 440 and a radiator 460. In addition, thefeeding structure 440 includes a resonance unit 441, a resonance addingunit 447, and a regulator 450. In this case, the resonance unit 441includes a feeding unit 443 and a grounding unit 445. In this case, asshown in FIGS. 12 to 17, the resonance unit 441 may extend to a feedingpoint 444 of the feeding unit 443, and may be expressed as a conductivewire. In addition, the resonance adding unit 447 may be expressed as aconductive wire as shown in FIG. 12. In addition, the resonance addingunit 447 may include a reactance element 448 as shown in FIGS. 13 to 17.In other words, the reactance element 448 may be provided on theconductive wire. Since each configuration of the present embodiment issimilar to that of the previous embodiment described above, the detailsthereof will be omitted.

However, in the antenna apparatus 400 according to the presentembodiment, the regulator 450 is provided in both of the resonanceadding unit 447 and the grounding unit 445. In this case, the regulator450 includes a first regulator 451 and a second regulator 453. Inaddition, the first regulator 451 is provided in the resonance addingunit 447, and the second regulator 453 is provided in the grounding unit445. In this case, the first regulator 451 may be interposed in theresonance adding unit 447, and the second regulator 453 may beinterposed in the grounding unit 445. Accordingly, a signal isintroduced into the regulator 450 from the feeding unit 443.

In addition, the first regulator 451 includes a reactance element. Inother words, the reactance element of the first regulator 451 isprovided in the resonance adding unit 447. In this case, the reactanceelement of the first regulator 451 may be interposed in the resonanceadding unit 447. In this case, the reactance element of the firstregulator 451 has preset reactance. In other words, the reactanceelement of the first regulator 451 regulates the electricalcharacteristic of the antenna device 440 based on the reactance. In thiscase, the reactance element of the first regulator 451 includes at leastone of a capacitive element and an inductive element. For example, thecapacitive element may be a capacitor, and the inductive element may bean inductor.

In this case, the first regulator 451 may be provided on a conductivewire corresponding to the resonance adding unit 447 as shown in FIG. 12.Meanwhile, if the resonance adding unit 447 includes the reactanceelement 448, the first regulator 451 may be connected with the reactanceelement 448 as shown in FIGS. 13 to 17. In this case, as shown in FIGS.13 to 15, the first regulator 451 may be connected with at least one ofboth end portions of the reactance element 448 in series. In addition,as shown in FIGS. 16 and 17, the first regulator 451 may be connectedwith the reactance element 448 in parallel.

In addition, the second regulator 453 includes a reactance element. Inother words, the reactance element of the second regulator 453 isprovided in the grounding unit 445. In this case, the reactance elementof the second regulator 453 may be interposed in the grounding unit 445.In this case, the reactance element of the second regulator 453 haspreset reactance. In other words, the reactance element of the secondregulator 453 regulates the electrical characteristic of the antennadevice 430 based on reactance. In this case, the reactance element ofthe second regulator 453 includes at least one of a capacitive elementand an inductive element. For example, the capacitive element may be acapacitor. In addition, the inductive element may be an inductor.

In this case, the second regulator 453 may include an inductor or acapacitor as shown in FIGS. 12( a) and (b) and FIGS. 17( a) and 17(b).Meanwhile, the second regulator 453 may include both of an inductor anda capacitor as shown in FIGS. 12( c), 12(d), 12(e), and 12(f) and FIGS.17( c), 17(d), 17(e), and 17(f). In this case, as shown in FIGS. 12( c)and 12(d) and FIGS. 17( c) and 17(d), the inductor may be connected withthe capacitor in series. In addition, as shown in FIGS. 12( e) and 12(f)and FIGS. 17( e) and 17(f), the inductor may be connected with thecapacitor in parallel.

Accordingly, the feeding structure 440 and the radiator 460 operatetogether. In this case, if the signal from the driving substrate 410 issupplied, the feeding structure 440 transmits the signal. Then, thesignal is supplied to the radiator 460 from the feeding structure 440.In this case, as shown in FIGS. 12 to 17, two loops of a first resonanceloop L1 and a second resonance loop L2 are formed in the feedingstructure 440.

The first resonance loop L1 is formed by the resonance unit 441. Inother words, the first resonance loop L1 includes the feeding unit 443and the grounding unit 445. The second resonance loop L2 is formed bythe grounding unit 445 and the resonance adding unit 447. In otherwords, the second resonance loop L2 includes the grounding unit 445 andthe resonance adding unit 447. In this case, when the resonance addingunit 447 includes the reactance element 448, the reactance element 448may change the second resonance loop L2. In other words, the secondresonance loop L2 may be changed based on the reactance of the reactanceelement 448. In addition, the regulator 450 changes the first resonanceloop L1 and the second resonance loop L2. In this case, the firstregulator 451 changes the second resonance loop L2. In other words, thesecond resonance loop L2 is changed based on the reactance of the firstregulator 451. In addition, the second regulator 453 changes the firstresonance loop L1 and the second resonance loop L2. In other words, thefirst resonance loop L1 and the second resonance loop L2 are changedbased on the reactance of the second regulator 453.

In addition, the antenna apparatus 400 operates at a preset resonancefrequency band. For example, the antenna apparatus 400 may have the sameoperating characteristic as that shown in FIG. 4, similarly to theprevious embodiment described above. In other words, the antennaapparatus 400 makes a resonance at the first and second resonancefrequency band f1 and f2. In this case, the first resonance frequencyband f1 is determined based on the first resonance loop L1. In otherwords, the first resonance frequency band f1 is determined based on thesize of the first resonance loop L1. In addition, the second resonancefrequency band f2 is determined based on the second resonance loop L2.In other words, the second resonance frequency band f2 is determinedbased on the size of the second resonance loop L2. In this case, whenthe resonance adding unit 447 includes the reactance element 448, thesecond resonance frequency band f2 may be regulated based on thereactance of the reactance element 448. In addition, the first andsecond resonance frequency bands f1 and f2 are regulated by theregulator 450. In this case, the first and second resonance frequencybands f1 and f2 are regulated in the frequency domain. In other words,the second resonance frequency band f2 is regulated based on thereactance of the first regulator 451. In addition, the first and secondresonance frequency bands f1 and f2 are regulated based on reactance.

Meanwhile, although the regulator 450 is provided in the resonanceadding unit 447 and the grounding unit 445 according to the presentembodiment for the illustrative purpose, the present invention is notlimited thereto. In other words, the present invention may be realizedby providing the regulator 450 on at least two of the feeding unit 443,the grounding unit 445, and the resonance adding unit 447.

For example, the regulator 450 may be provided at the resonance addingunit 447 and the feeding unit 443. In this case, the first regulator 451may be provided at the resonance adding unit 447 and the secondregulator 453 may be provided at the feeding unit 443. In addition, thefirst regulator 451 may include an inductor or a capacitor, or mayinclude both of an inductor and a capacitor. In this case, the inductormay be connected with the capacitor in series or in parallel. Inaddition, the first regulator 451 may be provided in at least one ofboth end portions of the reactance element 448 in the resonance addingunit 447. In addition, the second regulator 453 may include an inductoror a capacitor, or may include both of the inductor and the capacitor.In addition, the inductor and the capacitor may be connected with eachother in series or in parallel.

Accordingly, the first resonance frequency band f1 is determined basedon the first resonance loop L1, and the second resonance frequency bandf2 is determined based on the second resonance loop L2. In addition, thefirst and second resonance frequency bands f1 and f2 are regulated bythe regulator 450. In this case, the first and second resonancefrequency bands f1 and f2 are regulated in the frequency domain. Inother words, the second resonance frequency band f2 is regulated basedon the reactance of the first regulator 451. In addition, the first andsecond resonance frequency bands f1 and f2 are regulated based on thereactance of the second regulator 453

In addition, the regulator 450 may be provided at the feeding unit 443and the grounding unit 445. Accordingly, the first regulator 451 may beprovided at the feeding unit 443, and the second regulator 453 may beprovided at the grounding unit 445. In addition, the first regulator 451may include an inductor or a capacitor, or may include both of theinductor and the capacitor. In addition, the inductor may be connectedwith the capacitor in series or in parallel. In addition, the secondregulator 453 may include an inductor or a capacitor, or may both of theinductor and the capacitor. In this case, the inductor may be connectedwith the capacitor in series or in parallel.

Accordingly, the first resonance frequency band f1 is determined basedon the first resonance loop L1, and the second resonance frequency bandf2 is determined based on the second resonance loop L2. In addition, thefirst resonance frequency band f1 and the second resonance frequencyband f2 are regulated by the regulator 450. In this case, the first andsecond resonance frequency bands f1 and f2 are regulated in thefrequency domain. In other words, the first and second resonancefrequency bands f1 and f2 are regulated based on the reactance of thefirst and second regulators 451 and 453.

FIG. 18 is an exploded perspective view showing an antenna apparatusaccording to the fifth embodiment of the present invention. FIGS. 19 to25 are circuit diagrams showing equivalent circuits of a feedingstructure shown in FIG. 18 for an illustrative purpose. FIG. 26 is agraph to explain an operating characteristic of the antenna apparatusaccording to the fifth embodiment of the present invention.

Referring to FIG. 18, an antenna apparatus 500 according to the presentembodiment includes a driving substrate 510, a grounding structure 520,an antenna device 530, and a mounting member 570. In addition, theantenna device 530 includes a feeding structure 540 and a radiator 560.In addition, the feeding structure 540 includes a resonance unit 541, aresonance adding unit 547, and a regulator 550. In this case, theresonance unit 541 includes a feeding unit 343 and a grounding unit 345.In this case, the resonance unit 541 may extend to a feeding point 5344of the feeding unit 543 as shown in FIGS. 19 and 25, and may beexpressed as a conductive wire. In addition, as shown in FIGS. 19 to 25,the resonance adding unit 547 may include a reactance element 548. Inother words, the reactance element 548 may be provided on the conductivewire. Since each configuration of the present embodiment is similar to arelevant configuration of the previous embodiment described above, thedetails thereof will be omitted.

However, in the antenna apparatus 500 according to the presentembodiment, a resonance frequency band of the antenna device 530includes a first resonance frequency band f1, a second resonancefrequency band f2, and a third resonance frequency band f3. In thiscase, the first resonance frequency band f1 may correspond to a lowerfrequency when comparing with the second and third resonance frequencybands f2 and f3. In addition, the second resonance frequency band f2 maycorrespond to a higher frequency when comparing with the first resonancefrequency band f1 and the third resonance frequency band f3. In otherwords, the third resonance frequency band f3 may correspond to a higherfrequency when comparing with the first resonance frequency band f1, andmay correspond to a lower frequency when comparing with the secondresonance frequency band f2. In addition, the first resonance frequencyband f1, the second resonance frequency band f2, and the third resonancefrequency band f3 may be spaced apart from each other in the frequencydomain. In addition, at least two of the first to third resonancefrequency bands f1, f2, and f3 may be coupled to each other in afrequency domain. Accordingly, the resonance frequency band of theantenna device 330 may correspond to a multiple frequency band, and maycorrespond to a broad frequency band.

To this end, in the antenna device 500 according to the presentembodiment, the resonance unit 541 includes the feeding unit 543, thefirst grounding unit 545, and the second grounding unit 546. In thiscase, the feeding unit 543 is interposed between the first groundingunit 545 and the second grounding unit 546. In other words, the firstand second grounding units 545 and 546 face each other about the feedingunit 543. The resonance unit 541 is formed by coupling the feeding unit543, the first grounding unit 545, and the second grounding unit 546together. In this case, as shown in FIGS. 19 to 25, the resonance unit541 may be expressed as a conductive wire. Further, in the resonanceunit 541, the feeding unit 543 and the first grounding unit 545 mayconstitute an individual loop, and the feeding unit 543 and the secondgrounding unit 546 may constitute an individual loop.

The feeding unit 543 supplies a signal to the resonance unit 541. Inother words, the feeding unit 543 makes contact with the transmissionline of the driving substrate 510. In this case, the feeding unit 543makes contact with the transmission line through one end portionthereof. In this case, one end portion of the feeding unit 543 isdefined as the feeding point 544. For example, the feeing point 544 maymake contact with the transmission line near the grounding structure520. In other words, the feeding point 544 does not make contact withthe grounding structure 520. Accordingly, the signal is supplied to thefeeding unit 543 from the control module. In addition, the feeding unit543 extends from the transmission line. In this case, the feeding unit543 extends to an opposite end portion thereof. Accordingly, the signalis supplied from one end portion of the feeding unit 543 to the oppositeend portion of the feeding unit 543. In addition, the feeding unit 543includes a conductive material. In this case, the feeding unit 543 mayinclude at least one of Ag, Pd, Pt, Cu, Au, and Ni.

The first grounding unit 545 grounds the resonance unit 541. In otherwords, the first grounding unit 545 makes contact with the groundingstructure 520. In this case, one end portion of the first grounding unit545 may make contact with the grounding structure 520 through one endportion thereof. In addition, the first grounding unit 545 extends fromthe grounding structure 520. In this case, the first grounding unit 545extends to an opposite end portion thereof. In this case, the firstgrounding unit 545 makes contact with the feeding unit 543 through theopposite end portion thereof. Accordingly, the first grounding unit 545is grounded, and the signal is transmitted from the feeding unit 543 tothe first grounding unit 545. In addition, the first grounding unit 545includes a conductive material. In this case, the first grounding unit545 may include at least one of Ag, Pd, Pt, Cu, Au, and Ni.

The second grounding unit 546 grounds the resonance unit 541, separatelyfrom the first grounding unit 545. In other words, the second groundingunit 546 makes contact with the grounding structure 520. In this case,one end portion of the second grounding unit 546 makes contact with thegrounding structure 520. In addition, an opposite end portion of thesecond grounding unit 546 makes contact with the feeding unit 543.Accordingly, the second grounding unit 546 is grounded, and a signal istransmitted from the feeding unit 543 to the second grounding unit 546.In addition, the second grounding unit 546 includes a conductivematerial. In this case, the second grounding unit 546 may include atleast one of Ag, Pd, Pt, Cu, Au, and Ni.

Further, in the antenna apparatus 500 according to the presentembodiment, the regulator 550 is provided at the resonance adding unit547 and the first grounding unit 545 as shown in FIG. 19. In this case,the regulator 550 includes a first regulator 551 and a second regulator553. In addition, the first regulator 551 is provided at the resonanceadding unit 547, and the second regulator 553 is provided at the firstgrounding unit 545. In this case, the first regulator 551 may beprovided at the resonance adding unit 547, and the second regulator 553may be provided at the first grounding unit 545. Accordingly, the signalis introduced into the regulator 550 from the feeding unit 543.

In addition, the first regulator 551 includes a reactance element. Inother words, the reactance element of the first regulator 551 isprovided at the resonance adding unit 547. In this case, the reactanceelement of the first regulator 551 may be interposed in the resonanceadding unit 547. In this case, the reactance element of the firstregulator 551 has preset reactance. In other words, the reactanceelement of the first regulator 551 regulates the electricalcharacteristic of the antenna device 530 based on the reactance. In thiscase, the reactance element of the first regulator 551 includes at leastone of a capacitive element and an inductive element. For example, thecapacitive element may be a capacitor. In addition, the inductiveelement may be an inductor.

In this case, the first regulator 551 may be provided at a conductivewire corresponding to the resonance adding unit 547. Meanwhile, when theresonance adding unit 547 includes a reactance element 548, the firstregulator 551 may be connected with the reactance element 548. Inaddition, the first regulator 551 may be connected with at least one ofboth end portions of the reactance element 548 in series. In addition,the first regulator 551 may be connected with the reactance element 548in parallel.

In addition, the regulator 553 includes a reactance element. In otherwords, the reactance element of the second regulator 553 is provided atthe first grounding unit 545. In this case, the reactance element of thesecond regulator 553 may be interposed in the first grounding unit 545.In this case, the reactance element of the second regulator 553 haspreset reactance. In other words, the reactance element of the secondregulator 553 regulates the electrical characteristic of the antennadevice 530 is regulated based on the reactance. In this case, thereactance element of the second regulator 553 includes at least one of acapacitive element and an inductive element. For example, the capacitiveelement may be a capacitor. In addition, the inductive element may be aninductor.

In this case, the second regulator 553 may include an inductor or acapacitor. Meanwhile, the second regulator 553 may include both of theinductor and the capacitor. In addition, the inductor and the capacitormay be connected with each other in series. In addition, the inductorand the capacitor may be connected with each other in parallel.

Meanwhile, as shown in FIGS. 20 to 25, in the antenna apparatusaccording to the present embodiment, the regulator 550 may be providedat a second grounding unit 546, as well as the resonance adding unit 547and the first grounding unit 545. The regulator 550 may further includea third regulator 555 as well as a first regulator 551 and a secondregulator 553. In addition, the third regulator 555 may be provided atthe second grounding unit 546. In this case, the third regulator 555 maybe interposed at the second grounding unit 546. Accordingly, the signalmay be introduced into the third regulator 555 from the feeding unit543.

In addition, the third regulator 555 includes a reactance element. Inother words, the reactance element of the third regulator 555 isprovided at the second grounding unit 546. In this case, the reactanceelement of the third regulator 555 may be interposed in the secondgrounding unit 546. In this case, the reactance element of the thirdregulator 555 has preset reactance. In other words, the reactanceelement of the third regulator 555 regulates the electricalcharacteristic of the antenna device 530 based on the reactance. In thiscase, the reactance element of the third regulator 555 includes at leastone of at least one of a capacitive element and an inductive element.For example, the capacitive element may be a capacitor. In addition, theinductive element may be an inductor.

In this case, the third regulator 555 may include an inductor or acapacitor as shown in FIGS. 20 and 21. Meanwhile, the third regulator555 may include both of an inductor and a capacitor as shown in FIGS. 22to 25. In this case, as shown in FIGS. 22 and 23, the inductor and thecapacitor may be connected with each other in series. In addition, asshown in FIGS. 24 and 25, the inductor may be connected with thecapacitor in parallel.

Accordingly, the feeding structure 540 and the radiator 560 operatetogether. In this case, if the signal from the driving substrate 510 issupplied, the feeding structure 540 transmits the signal. Then, thesignal is supplied to the radiator 560 from the feeding structure 540.In this case, as shown in FIGS. 19 and 25, three resonance loops of afirst resonance loop L1, a second resonance loop L2, and a thirdresonance loop L3 are formed in the feeding structure 540.

In this case, the first resonance loop L1 and the third resonance loopL3 are formed by the resonance unit 541. In this case, the firstresonance loop L1 includes the feeding unit 543 and the first groundingunit 545. In addition, the third resonance loop L3 includes the feedingunit 543 and the second grounding unit 546. The second resonance loop L2is formed by the first grounding unit 545 and the resonance adding unit547. In other words, the second resonance loop L2 includes the firstgrounding unit 545 and the resonance adding unit 547. In this case, whenthe resonance adding unit 547 includes the reactance element 548, thereactance element 548 may change the second resonance loop L2. In otherwords, the second resonance loop L2 may be changed based on thereactance of the reactance element 548.

In addition, the regulator 550 changes the first resonance loop L1, thesecond resonance loop L2, and the third resonance loop L3. In this case,the first regulator 551 changes the second resonance loop L2. In otherwords, the second resonance loop L2 is changed based on the reactance ofthe first regulator 551. In addition, the second regulator 553 changesthe first resonance loop L1 and the second resonance loop L2. In otherwords, the first and second resonance loops L1 and L2 are changed basedon the reactance of the second regulator 553. In addition, the thirdregulator 555 changes the third resonance loop L3. In other words, thethird resonance loop L3 is changed based on the reactance of the thirdregulator 555.

In addition, the antenna apparatus 500 operates at a preset resonancefrequency band. For example, the antenna apparatus 500 may have the sameoperating characteristic as that shown in FIG. 26. In other words, theantenna apparatus 500 makes a resonance at first, second, and thirdresonance frequency bands f1, f2, and f3. In this case, the firstresonance frequency band f1 is determined based on the first resonanceloop L1. In other words, the first resonance frequency band f1 isdetermined based on the size of the first resonance loop L1. Inaddition, the second resonance frequency band f2 is determined based onthe second resonance loop L2. In other words, the second resonancefrequency band f2 is determined based on the size of the secondresonance loop L2. In this case, when the resonance adding unit 547includes the reactance element 548, the second resonance frequency bandf2 may be regulated based on the reactance of the reactance element 548.In addition, the third resonance frequency band f3 is determined basedon the third resonance loop L3. In other words, the third resonancefrequency band f3 is determined based on the size of the third resonanceloop L3.

In addition, the first, second, and third resonance frequency bands f1,f2, and f3 are regulated by the regulator 550. In this case, the firstand second resonance frequency bands f1 and f2 are regulated in thefrequency domain. In other words, the second resonance frequency band f2is regulated based on the reactance of the first regulator 551. Inaddition, the first and second resonance frequency bands f1 and f2 areregulated based on reactance of the second regulator 553. In addition,the third resonance frequency band f3 is adjusted based on the reactanceof the third regulator 555.

Meanwhile, although the first and second regulators 551 and 553 areprovided in the resonance adding unit 547 and the grounding unit 545,respectively, according to the present embodiment for the illustrativepurpose, the present invention is not limited thereto. In other words,the present invention may be realized by separately providing the firstand second regulators 551 and 553 in at least two of the feeding unit543, the grounding unit 545, and the resonance adding unit 547.

For example, the first and second regulators 551 and 553 may be providedat the resonance adding unit 547 and the feeding unit 543. In this case,the first regulator 551 may be provided at the resonance adding unit547, and the second regulator 553 may be provided at the feeding unit543. In addition, the first regulator 551 may include an inductor or acapacitor, or may include both of an inductor and a capacitor. In thiscase, the inductor may be connected with the capacitor in series or inparallel. In addition, the first regulator 551 may be provided in atleast one of both end portions of the reactance element 548 in theresonance adding unit 547. In addition, the second regulator 553 mayinclude an inductor or a capacitor, or may include both of the inductorand the capacitor. In addition, the inductor and the capacitor may beconnected with each other in series or in parallel.

Accordingly, the first resonance frequency band f1 is determined basedon the first resonance loop L1, and the second resonance frequency bandf2 is determined based on the second resonance loop L2. In addition, thefirst and second resonance frequency bands f1 and f2 are regulated bythe regulator 550. In this case, the first and second resonancefrequency bands f1 and f2 are regulated in the frequency domain. Inother words, the second resonance frequency band f2 is regulated basedon the reactance of the first regulator 551. In addition, the first andsecond resonance frequency bands f1 and f2 are regulated based on thereactance of the second regulator 453

In addition, the first and second regulators 551 and 553 may be providedat the feeding unit 543 and the grounding unit 545. Accordingly, thefirst regulator 551 may be provided at the feeding unit 543, and thesecond regulator 553 may be provided at the grounding unit 545. Inaddition, the first regulator 551 may include an inductor or acapacitor, or may include both of the inductor and the capacitor. Inaddition, the inductor may be connected with the capacitor in series orin parallel.

Accordingly, the first resonance frequency band f1 is determined basedon the first resonance loop L1, and the second resonance frequency bandf2 is determined based on the second resonance loop L2. In addition, thefirst and second resonance frequency bands f1 and f2 are regulated bythe regulator 550. In this case, the first and second resonancefrequency bands f1 and f2 are regulated in the frequency domain. Inother words, the first and second resonance frequency bands f1 and f2are regulated based on the reactance of the first and second regulators551 and 553.

According to the present invention, the resonance frequency bands of theantenna apparatuses 100, 200, 300, 400, and 500 can be easily regulated.In other words, as the feeding structures 140, 240, 340, 440, and 540include regulators 150, 250, 350, 450, and 550, the resonance frequencybands of the antenna apparatuses 100, 200, 300, 400, and 500 can beeasily regulated. In the feeding structures 140, 240, 340, 440, and 540,at least one of the resonance bands can be regulated based on thepositions and reactance of the regulators 150, 250, 350, 450, and 550.Accordingly, the resonance frequency bands may be regulated without theincrease of the size of the antenna apparatuses 100, 200, 300, 400, and500 to a large size.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the spirit and scope of the principles ofthis disclosure. More particularly, various variations and modificationsare possible in the component parts and/or arrangements of the subjectcombination arrangement within the scope of the disclosure, the drawingsand the appended claims

1-26. (canceled)
 27. A feeding structure comprising: a resonance unitcomprising a feeding unit and a grounding unit connected with thefeeding unit; a resonance adding unit between the feeding unit and thegrounding unit; and a regulator in the feeding unit.
 28. The feedingstructure of claim 27, wherein the regulator changes a resonance loopformed by the resonance unit.
 29. The feeding structure of claim 27,wherein the regulator comprises at least one reactance element.
 30. Thefeeding structure of claim 29, wherein the regulator comprises aplurality of reactance elements connected with each other in series orin parallel.
 31. The feeding structure of claim 29, wherein thereactance element comprises at least one of a capacitive element and aninductive element.
 32. A feeding structure comprising: a resonance unitcomprising a feeding unit and a grounding unit connected with thefeeding unit; a resonance adding unit between the feeding unit and thegrounding unit; and a regulator in the grounding unit, wherein thegrounding unit comprises a first grounding unit and a second groundingunit provided in opposition to each other about the feeding unit,wherein the regulator is provided at least one of the first groundingunit and the second grounding unit.
 33. The feeding structure of claim32, wherein the regulator comprises a first resonance loop formed by theresonance unit and a second resonance loop formed by the grounding unitand the resonance adding unit.
 34. The feeding structure of claim 32,wherein the regulator is additionally provided in at least one of thefeeding unit and the resonance adding unit.
 35. The feeding structure ofclaim 34, wherein the resonance adding unit comprises at least onereactance element.
 36. A feeding structure comprising: a resonance unitcomprising a feeding unit and a grounding unit connected with thefeeding unit; a resonance adding unit between the feeding unit and thegrounding unit; and a regulator in the grounding unit.
 37. The feedingstructure of claim 36, wherein the regulator comprises a first resonanceloop formed by the resonance unit and a second resonance loop formed bythe grounding unit and the resonance adding unit.
 38. The feedingstructure of claim 36, wherein the grounding unit comprises a firstgrounding unit and a second grounding unit provided in opposition toeach other about the feeding unit.
 39. The feeding structure of claim38, wherein the regulator is provided at least one of the firstgrounding unit and the second grounding unit.
 40. The feeding structureof claim 36, wherein the regulator is additionally provided in at leastone of the feeding unit and the resonance adding unit.
 41. The feedingstructure of claim 40, wherein the resonance adding unit comprises atleast one reactance element.
 42. The feeding structure of claim 41,wherein the regulator is provided in at least one of both end portionsof the reactance element.
 43. The feeding structure of claim 41, whereinthe regulator is connected with the reactance element in series or inparallel.
 44. The feeding structure of claim 41, wherein the reactanceelement comprises at least one of a capacitive element and an inductiveelement.
 45. The feeding structure of claim 36, wherein the regulatorcomprises at least one reactance element.
 46. The feeding structure ofclaim 45, wherein the regulator comprises a plurality of reactanceelements connected with each other in series or in parallel.
 47. Thefeeding structure of claim 45, wherein the reactance element comprisesat least one of a capacitive element and an inductive element.